Separator



Xian. 1, 1929. l,`697,743

G. C. WEBSTER sEPARAToR Filed Feb. 17. 1925l 2 Sheets-Sheer, 1

u /rjr 'V' n KQ f t M .'z-Ji INVENTOR ATTORNEYS Jan. l, 1929.

s. c. WEBSTER SEPRATOR Filed Feb. 17, 1925 2 sheets-sheet 2 WITNESSES ATTORNEYS Patented Jan. 1, 1929.

Urrsn eras 1,691,743 orties.

snrARAron.

Application led February This invention relates to an improvement in separators, and has for its object to provide a separator which is especially designed and adapted for use in separating pulverulent, powdered, or finely comminuted solids from air laden therewith.

A further object is to provide a separator having the foregoing enumerated advantages and capacities and which also effects a complete and thorough separation in an efficient, safe and clean manner byy means of instrumentalities simple and durable in construction, reliable in operation, and easy and comparatively inexpensive to manufacture and operate.V

Other objects and advantages will be apparent during the course of the following description taken in conjunction with the accompanying drawings, in which:

Figure 1 is a view partly in elevation and partly in section showing one embodiment of the invention,

Figure 2 is a view in section on the line 2 2 of vFigure 1, parts being shown in elevation for the sake of illustration.

Figure 3 is a view in section on the line 3-3 of Figure 2, parts being shown in elevation for the sake of illustration,

Figure 4 is a fragmentary detail view partly in section and partly in elevation showing the automatically operable valve of the dust collector.

Referring to the drawings the numeral designates a building structure in which a Separator, designated generally at 11, is located. The separator 11 includes a base 12 on .which an electric motor 13 is supported. The motor 13 operates a suction or exhaust fan 14. The suction or exhaust fan 14 includes a casing 15 in which a fan proper, designated at 16, operates. rIhe inlet to the fan casing 15 connects with an offtalre 17 of a chute 18, the ofltake leading into the underside of the chute adjacent its lower end. The chute 18 is inclined and its upper open end is connected with the lower open end of an hopper 19, the hopper 19 being supported on the chute and on a standard 20. Within the chute 18 an inclined screen or sieve 21 is positioned and suitably secured.

rlhe exhaust or discharge port of the fan casing 15 connects with a conduit 22 which leads to a dust collector, designated generally at 23, and which constitutes this invention, and is preferably located exteriorly of the building structure.

17, 1925.k .serial No. 9,845. q

The dust collector 23 includes a cylindrical outer casing 24 having its ends closed by end plates 25 formed with square openings 25a. Of course, it is to be understood that the configuration of the openings of the end plates may be varied. .An inner casing 26 is set in the outer casing and the inner casing is of square form and preferably corresponds vin form and size to theshape of the openings 25a. lThe inner casing 26 includes vertical side walls 27 and horizontal top andy bottom walls 28. The top and bottom walls 28are provided with flanged ports oropenings 29, the openings orports of the top wall being in a vertical line with the opening or ports of the bottom wall and the aligned openings of the ports being connected by cylinders 30 of fabric or other material which is pervious to air butV impervious to dust. An imperforate shield 31 covers the top wall 28. The conduit 22 is provided with a portion 22a which constitutes the inlet to the collector 23 and which delivers the dust-laden air to the casing 24 substantially tangentially thereof. As shown to advantage in Figure .3 a separating chamber 32 is formed in the casing 24 and around in this chamber 32 the` dust-laden air whlrls and this whirling motion tends to precipitate the dust in the air. The air after whirling around from the top of the chamber 32 to the bottom thereof passes up through the flanged openings 29 in the bottom wall 28 of the inner casing 26 into the filtering sleeves 30. The air passes through the sleeves 30 to the atmosphere but` the dust cannot pass thro-ugh the sleeves and falls down into the lower f portion of the casing 24. Should any dust pass up through the upper ends of the tubes it will impinge the shield 31 which is domeshaped and which will return the dust through the tubes 30. The lower portion of the casing 24` is formed with a hopper 33 terminating in a discharge portion 34 of cylindrical form. A conical valve 35 co-acts with the discharge portion 34 and is carried on an angular arm 36 pivoted, as at 38', on the bracket 38 and controlled by an adjustable weight 39. The weight 39 operates to hold the valve 35 closed until the hopper is about two-thirds full ywhen the weight of the dust pushes the valve 35 downwardly to permit the dust to fall from the outlet 34. This escape of the dust continues until the hopper is about one-fourth full when the force eX- erted by the weight 39 will be sufficient to close the valve. The discharge outlet 34 is always blocked by some dust and consequently escape ofthe air through the outlet is prevented,

The dust which falls from the outlet 34 passes into a hopper l() formed on the upper end of a flaring cover 4l provided for a dust receptacle 42. A fabric envelope 43 may be secured to the discharge outlet 34 byl means of aV clamp 45 and hangs down over the hopper 40 and cover il to preclude any possibility of the escape of dust. As shown in Fig. l the outlet 34 extends down into the hopper 40 so that in some instances it may not be necessary to employ the envelope 43.

- The collector' 23 may be supported in any suitable manner and in the construction shown the collector is formed with a pair of eyes 5() slidably fitted on a supporting rod 51 carried by one or more posts 52.

With the arrangement described herein admixed large particles and finely comminuted solids, such, for instance, as a mixture of ashes, cinders and partially burned and relatively large pieces of coal, is dumped into the hopper 19, the electric motor having been started and the butterfly valve 60 having n been opened. The mixture slides over the screen or sieve 21 and during its passage down the screen the suction exerted byf the exhaust fan draws the ashes or inely comminuted solids through the screen, through the ofitale 17 and into the fan casing and expels the dust thus entrained through the conduit 22 to the collector 23 wherein the dustV is separated from the air as hereinabove described. The solid or relatively large particles, such as oinders, or the like, drop out of the lower end of the chute into the receptacle 6l.

It is proposed to use the structure hereinabove described in many and various ways and for this purpose an auxiliary inlet is provided into the oiitakell of the chute 18.

Any desirable type of cleaning or sifting tool may be coupled up to the auxiliary inlet 65 by any suitable means.

I claim:

l. A dust collector for separating finely divided entrained particles from an air current comprising an outer casing having end plates provided with openings, an inner casing of tubular form set in the outer casing and spaced therefrom and having its open ends registering with the openings in the end plates, filtering tubes carried by the inner casing communicating with the space between Y the inner and outer casing, said filtering tubes permitting the escape of air butpreventing the escape of dust, and an inletfor dust laden air. opening into the space between said casings.

2. A dust collector for separating finely divided entrained particles from an air current and comprising an outer casing having end plates provided with openings, an inner casing of' tubular form set in the outer casing and spaced therefrom and having its open ends registering with the open ends of the end plates, a dust laden air inlet opening into the space between said casing, filtering tubes carried byl the .inner casing communicating vvith'the space between the inner and outer casing, said filtering tubes permitting the escape of air but preventing the escape of dust, said outer casing having a dust discharge equipped with means to prevent the passage of air therefrom.

3. A dust collector for separating finely divided entrained particles from an air current and comprising an outer casing having end plates provided with openings, an inner casing of tubular form set in the outer casing and spaced therefrom and having its open ends registering with the openings in the end plates, an inlet for dust laden air opening into the space between said casings, filtering tubes carried by the inner casing and opening through the top and bottom walls thereof and communicating with the space between the inner and outer casing, said filtering tubes permitting the escape of air but preventing the escape of dust, an imperforate shield located over the upper end of said inner casino' and adapted to return the dust passing through the upper ends of the tubes back through the tubes into the outer casing, and means for conducting the collected Adust from the outer casing.

GEORGE c. wnnsrna. 

